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Separating and upgrading method of bio-oil by column chromatography

A technology of bio-oil and column chromatography, which is applied in separation methods, chemical instruments and methods, solid adsorbent liquid separation, etc., can solve the problems that cannot be directly used as fuel, low calorific value of bio-oil, poor stability, etc., to achieve faster Study the pace, simplicity of the process, and the effect of improving quality

Inactive Publication Date: 2013-01-30
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bio-oil has disadvantages such as low calorific value, high oxygen content, strong corrosion and poor stability. As a result, bio-oil is different from petroleum and cannot be directly used as fuel. It can be used as fuel only after it has been reorganized and catalytic cracked.

Method used

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  • Separating and upgrading method of bio-oil by column chromatography
  • Separating and upgrading method of bio-oil by column chromatography

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Extract the bio-oil crude oil produced by hydrothermal liquefaction of Enteromorpha at 280°C with dichloromethane, concentrate it to asphalt state by rotary evaporation, take a sample of 0.982g, dissolve it in 10ml of dichloromethane, add 1g of silica gel, mix well and spin The solvent was removed, and the obtained powder was evenly spread on the top layer of a silica gel chromatography column (25×750mm). After silica gel column chromatography, use n-hexane-dichloromethane-ethyl acetate gradient elution at room temperature, and then use n-hexane and dichloromethane at a volume ratio of 15:1 to elute for 60 minutes, dichloromethane, acetic acid The eluent with a volume ratio of ethyl ester of 10:1 was eluted for 60 minutes, and the eluent with a volume ratio of dichloromethane and ethyl acetate of 1:1 was eluted for 60 minutes. The column pressure is 5 bar, the flow rate of the eluent is 4 cm / min, and the collection is performed every 1 minute. GC-MS analysis shows that ...

Embodiment 2

[0022] Extract the bio-oil crude oil produced by hydrothermally liquefying rice straw at 300°C with ethyl acetate, concentrate it to asphalt state by rotary evaporation, take a sample of 0.993g, dissolve it in 5ml ethyl acetate, add 1g of silica gel, mix well and then spin off solvent, and the obtained powder was evenly spread on the top layer of the silica gel chromatography column (25×750mm). After silica gel column chromatography, use n-hexane-benzene-ethyl acetate gradient elution at room temperature, and then use n-hexane and benzene at a volume ratio of 15:1 to elute for 60 minutes, and benzene and ethyl acetate at a volume ratio of 10 : 1 eluent elution 60min, benzene, ethyl acetate volume ratio 1:1 eluent elution 60min. The column pressure is 5 bar, the flow rate of the eluent is 4 cm / min, and the collection is performed every 1 minute. GC-MS analysis shows that 4-ethyl guaiac is obtained at about 32 min, 72 min, 138 min, and 161 min after the elution starts. Maximum ...

Embodiment 3

[0024] The bio-oil crude oil produced by hydrothermal liquefaction of Salix salix at 280°C was extracted with tetrahydrofuran, concentrated by rotary evaporation to asphalt state, 0.972g was sampled, dissolved in 5ml of tetrahydrofuran, and 1g of silica gel was added, mixed well and then the solvent was rotated to obtain The powder was spread evenly on the top layer of the silica gel chromatography column (25×750mm). After silica gel column chromatography, use n-hexane-benzene-ethyl acetate gradient elution at room temperature, and then use n-hexane and benzene at a volume ratio of 15:1 to elute for 60 minutes, and benzene and ethyl acetate at a volume ratio of 10 : 1 eluent elution 60min, benzene, ethyl acetate volume ratio 1:1 eluent elution 60min. The column pressure was 5 bar, the flow rate of the eluent was 4 cm / min, and the samples were collected every 1 minute. According to GC-MS analysis, 4-ethylhexyl was obtained at about 35 min, 76 min, 122-132 min, and 163 min after...

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Abstract

The invention belongs to the technical field of environment and new energy, and relates to a separating and upgrading method of bio-oil by column chromatography. The bio-oil refers to a viscous oily substance generated by hydrothermal liquefaction and pyrolysis and other processes of biomass raw materials such as enteromorpha, microalgae, straw, salix psammophila, tobacco stems, corn cobs, wood chips and water hyacinth, and the bio-oil passes through a chromatography column by taking silica gel or aluminum oxide and the like as a carrier, and is respectively subjected to gradient elution with different organic solvents so as to respectively obtain different components such as organic acids, ketones, esters and phenols; and after being pooled and concentrated, the different compounds are separated by chromatography columns with different natures to obtain a bio-oil component with relatively higher purity, therefore the separation of a complex bio-oil mixing system is realized, and the development of biomass industry is greatly promoted. Compared with the traditional distillation separation, solvent extraction and other methods, the separation method has the advantages of low energy consumption, mild conditions, simple technological process, high separation efficiency, recycling and reuse of eluent, environmental friendliness and the like.

Description

technical field [0001] The invention belongs to the technical field of environment and new energy, and relates to a column chromatography separation and quality improvement method for bio-oil, in particular to the use of column chromatography separation technology to cut components of bio-oil to achieve bio-oil quality improvement and high added value The process of extraction of chemical products. Background technique [0002] At present, the large-scale exploitation and utilization of fossil energy such as coal, oil and natural gas and the problems caused by environmental pollution and global warming have made energy shortage and environmental degradation a bottleneck restricting the sustainable development of modern economy. The clean and renewable energy has been extensively studied by scholars from various countries. Biomass is the only renewable resource that can be stored, and its own carbon cycle can realize CO 2 Zero emissions, a renewable carbon source, and abund...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G25/00B01D15/22
Inventor 张士成杨潇陈凯绯高建宏李长军陈建民
Owner FUDAN UNIV
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